GHEC version (#20947)

Co-authored-by: Matt Pollard <mattpollard@users.noreply.github.com>
Co-authored-by: Grace Park <gracepark@github.com>
Co-authored-by: Steve Guntrip <12534592+stevecat@users.noreply.github.com>
Co-authored-by: Robert Sese <sese@github.com>
Co-authored-by: Peter Bengtsson <peterbe@github.com>
Co-authored-by: Rachael Sewell <rachmari@github.com>

content/get-started/using-git/dealing-with-non-fast-forward-errors.md

@@ -10,6 +10,7 @@ versions:
   fpt: '*'
   ghes: '*'
   ghae: '*'
+  ghec: '*'
 shortTitle: Non-fast-forward error
 ---
 If another person has pushed to the same branch as you, Git won't be able to push your changes: